刚性桩复合地基沉降变形与影响因素分析  

STUDY ON SETTLEMENT CHARACTER AND INFLUENCE FACTORS OF RIGID PILE COMPOSITE-FOUNDATION

作　　者：杨德健[1,2] 王铁成[1] 刘蕊[2] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]天津城市建设学院,天津300384

出　　处：《建筑技术》2011年第3期235-238,共4页Architecture Technology

基　　金：天津市科技攻关重点项目-天津滨海新区软土结构强度与地基处理优化研究;天津市科技攻关重点项目

摘　　要：探讨天津软土地区刚性桩复合地基桩、土、垫层共同作用的特点,分析不同荷载作用下刚性桩复合地基桩土位移场及桩土应力比的变化规律;采用ANSYS有限元软件分析垫层模量、桩间土模量及桩间距等因素对复合地基沉降变形的影响。研究表明,桩间土模量的变化对刚性桩复合地基的整体沉降量影响较显著,复合地基的整体沉降量随桩间土体模量的增加而减小;桩间距是控制刚性桩复合地基整体沉降量的主要因素之一。地基沉降量随桩间距的减小而减小,但桩间距过小时,对减少刚性桩复合地基整体沉降量的作用并不明显。Some engineering characteristics of rigid pile composite-foundation that pile-soil-cushion combined action and the settlement varying regularities under all sorts of influence factors were discussed. The varying regularities of pile and soil＇s displacement field under all sorts of different load have been analyzed. The settlement varying regularities and the influence degree under all sorts of influence factors were analyzed by FEM, the influence factors include the different cushion modulus, modulus of soil between piles, and pile spacing. The settlement of rigid pile composite-foundation is affected markedly by modulus of soil between piles. The pile spacing is the one of the main factors which affects the site settlement; and some measures of reducing settlement were putted forward.

关 键 词：刚性桩复合地基 沉降计算 垫层 桩土应力比 

分 类 号：TU753[建筑科学—建筑技术科学]